POST BUGS HERE! -> KNOWN BUGS (Rep+) <-

[SandTag]

I noticed nobody had made a known issues thread, but anyway i'm going to keep a list of as many as i can think of given there's so many of them lol. More dangerous/impactful issues at the top.

As issues get fixed, i will try to update the thread to remove them.
Incase the bug list gets really long, the second post may be used to store them lol.
ALL OF THESE ISSUES RELATE TO MULTIPLAYER - Singleplayer only bugs will be marked with an SO.

#1: When players become desync'ed its possible that the hosts save data is mixed with the desynced user, if they crash their save data is permanently destroyed, or if they complete the run without gaining any new marks, it can sometimes replace the old save data when restarting the run. If a player leaves exactly as the run starts the lobby can crash and the host or anyone else left (3p+) may get a random player in the lobby's save data.

#33: Losing connection to steam, even for a few seconds, causes you to be removed from the game and lose all progress. This is unnaceptable.

#36 People joining your run after using R-key will crash the lobby and cause all completion marks earned to be lost.

#35: Worm friend causes the game to crash if it is active when the deathmatch ends

#34 The chase scene causes a wide variety of items to glitch out afterwards, keeper's birthright results in permanent health loss, lil portal can be used twice on one floor and bumbo is entirely reset back to stage 1.

#29 Vanishing twin can spawn partially indestructible segmented enemies where only the head can take damage and the body acts like a reinforced worm boss from mines/ashpit. If this occurs with solex it can cause a softlock.

#27 Open public lobbies crash or desync when players try to join during ascent, which can cause bug #1.

#28 Items and effects that are not pedestal items but create semi/permanent player following entities such as micro cell and the Spiderbaby transformation can either crash or desync the lobby.

#22: If the game crashes during the post-match bonus game no players receive any marks whatsoever and the run is falsely recorded as a loss due to incorrect timing for adding victory.

#18: Challenges/Co-op sometimes incorrectly flag mods as being loaded and either don't open or don't give marks, or the user cannot enter the daily.

#17: Sumptorium's Curse (T.Eve only): Activates for the rest of the room in co-op when only red heart containers are drained, ignoring the soul hearts and clots, resulting in permanent moms knife whilst any soul hearts are owned.

#16: Glitched items created via dataminer are active as co-op babies, this causes softlocks if the glitched item contains suplex or moms bracer as an effect.

#25 If lag spikes occur using Anim Sola on T.Jacob, Esau may be released without charging and simply float around.

#21: Transformations occurs too slowly, causing the player to die in co-op when spending their last health on it. (I.E Leviathan/Sepharim with chaos)

#2: Players cannot rejoin/reconnect to runs ATALL after crashing, instead they lose all marks for the run and are forced to select a character again, wait and then get random items.

#11: Clicker causes no completion marks to be awarded.

#20: Sharp plug does not cost hp in the deathmatch.

#4: While in greed mode, the item pool is that of standard mode, causing a myriad of useless or comically overpowered items to spawn incorrectly, such as diplopia and sharp plug.

#7: Schoolbag in multiplayer wont update to show two items are being held until after leaving the room.
You also cannot use the schoolbag at all for the current room when swapping a second active for a third one.

#8: If you have items that allow you to fit through tiny spaces, such as Pluto, its possible to cause desync by exiting rooms while they are locked.

#9: Black markets spawn in greed mode inappropriately via crawl spaces.

#10: A floor 1 confessional in greed causes unusual behaviour with the angel/devil deals on caves.
Expected: Rolls as normal as the forced deal has already occurred, it was an angel deal.
Actual: Rolls as if floor 1 deal was never activated and is a forced devil deal, does not behave in the same way as Bethany who always has a guaranteed floor 1 angel deal.

#15: Reverse wheel of fortune: Can softlock the game (needs further testing).

#19: Some controllers fail to register.

#23: a visual issue occurs with the milk familiar when using glowing hourglass, making a "ghost" milk glass appear (it does nothing).

#13: The unlock for marbles does not cause the popup message.

[Shogun]

If you have Friend Finder (or the Pokeball that spawns friendly enemies) and you use any item like Uranus that freezes enemies. The resulting spikes when the frozen enemy explodes, can also freeze your friendly spawns. Super annoying as it's a ridiculous friendly fire that doesn't happen otherwise. Nor should it.

[Poligonal]

My game crashes every time I try to skip an ending cut-scene or the credits. If I wait through the credits the game crashes anyways. I deleted videos.a and it fixed some of it by removing some cut-scenes entirely but I worry once I get to dogma the cut-scene there will also crash. Also I shouldn't have to remove cut-scenes entirely to play the game.

Things I've tried:
-Turning off mods
-Reinstalling the game
-Restarting my computer
-Updating graphics driver
-Verifying integrity of game files

[LorensS_]

my datafile is gone, like i just got my previous data, i only have isaac and azazel with some marks but actually i have almost all characters with full marks. i just want my progress back :((

[SandTag]

Originally posted by LorensS_:

my datafile is gone, like i just got my previous data, i only have isaac and azazel with some marks but actually i have almost all characters with full marks. i just want my progress back :((

https://steamcommunity.com/sharedfiles/filedetails/?id=3370955558

[Ninja ZombieYoshi]

Originally posted by ChaoticDragox:

Setting Jacob & Esau Controls to Classic and Jacob having fully charged Active Item, you cannot use Jacob's Card/Pill/Rune without wasting his Active Item.

You are always forced to use up Active Item's Charge before you are allowed to use his Card/Pill/Rune.

This one's so disruptive! I kept using my Undefined instead of my Devil card! I can easily imagine particularly bad examples of Active Items just blocking you from using consumables, too. Imagine taking the Notched Pickaxe and just not being able to use a single pill that drops after you got Lucky Foot! Terrible! Really hoping this one gets patched out.

[SandTag]

Some bugs have been fixed, not all of them were actually in patch notes:

(Not in patch notes)
#12. Win streak in singleplayer is updated by winning in multiplayer, but is never reset when a run is lost either, though it shouldn't be interacted with since it is obviously a separate mode that even has its own streak counter!
[Unlisted]: Items are sometimes rolled twice when destroying reroll machines.

(In patch notes)
#5: Little spewer (yellow) has infinite duration creep.
#31: dice bag's dice are invisible, only showing the dice during the pickup animation.

[Edgylordd]

Originally posted by Degisik:

I'm playing on mac with the Wine emulator. Every time when isaac dives into the trapdoor ,instead of a pixelation effect the scrreen turns black while the HUD is still visible. Then it goes as normal, showing the nigtmare cutscenes and gong to a new level. When i get in the mirror world there is the same issue, i can't see the room .But i can still control isaac .

I am also having this issue. It has nothing to do with my end of things, since it was working PERFECTLY FINE before this update. I cannot complete ANY of the Mother route because of it. The entire screen inside the mirror is just pure black. I assume it has SOMETHING to do with the filter that gets added in that area, (also maybe explaining why the phase-in/out visual effect when entering/exiting floors/crawlspaces does not occur anymore either).

Just... for the love of god help. I sent an email to support WEEKS ago. I know they're probably swamped, but like, holy crap. I'm literally BARRED from an entire route.

[Shogun]

Honestly, what's the point in reporting these bugs anymore? I presume after Nicalis has been dumped in the next lifetime to a developer that would actually be proactive enough to read anything outside their official channels of reporting?

[phantom dier WWWWWWWWWWWWWWWWWWW]

Originally posted by Shogun:

Honestly, what's the point in reporting these bugs anymore? I presume after Nicalis has been dumped in the next lifetime to a developer that would actually be proactive enough to read anything outside their official channels of reporting?

because it's good to know as a player how to avoid bugs and to know when they occur, and in cases they are fixable or avoidable we can help eachother come to a solution.

[Ducklin9]

I recently experienced a bug. I was doing a greedier run with three other people and near the end, one left, and the other person and I continued the run and finished it. I got the mark on the note but did not receive the items. (this was for Magdalene and was the last mark needed). (Edit: I fixed the problem by going into secrets)

[Пивной Ковбой]

when i open obs to record video achievements in game are cannot be completed and my progress resets to the moment when i played without obs

[Samgie]

More crawl space funkiness. Got teleported to the devil room by a red chest. Picked up We Need To Go Deeper! from a devil deal, and used it in the devil room on a crawl space tile. Red chest in the crawl space teleported me back into the devil room (I had The Left Hand). I went back into the crawl space to get the other red chest, but I spawned across the room and not on the top of the ladder like usual. I was then stuck in the crawl space.

[Nur_ich]

I finished the mother fight and teleported out using the moon to grab satanic bible from the floor before moving on to void when I re-entered the portal was visible but there was an invisible wall setting the room size back to the fight phase one size meaning I couldn't get to the portal to do void. I have a screan recording but I don't know where to go with this information.

[phantom dier WWWWWWWWWWWWWWWWWWW]

Originally posted by Ducklin9:

I recently experienced a bug. I was doing a greedier run with three other people and near the end, one left, and the other person and I continued the run and finished it. I got the mark on the note but did not receive the items. (this was for Magdalene and was the last mark needed)

go to secrets menu to resync achievements

[SandTag]

Originally posted by WWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWW:

Originally posted by Ducklin9:

I recently experienced a bug. I was doing a greedier run with three other people and near the end, one left, and the other person and I continued the run and finished it. I got the mark on the note but did not receive the items. (this was for Magdalene and was the last mark needed)

go to secrets menu to resync achievements

You can also alt+f2 in secrets menu for more.